/*
 * Copyright 2019 BLK Technologies Limited (web3labs.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package io.web3j.libp2p.security.secio.util

import org.bouncycastle.crypto.Digest
import org.bouncycastle.crypto.macs.HMac
import org.bouncycastle.crypto.params.KeyParameter

object HashFactory {

    /**
     * Creates a hash implementation instance that uses the HMAC method.
     * @param keyBytes the secret key bytes.
     * @param digest the digest.
     * @return the instance to be used to generate hashes.
     */
    fun createHmac(keyBytes: ByteArray, digest: Digest): HMac = with(HMac(digest)) {
        init(KeyParameter(keyBytes))
        this
    }
}
